I. Product Overview
This product series comprises Danfoss (formerly Sauer-Danfoss) Electric Displacement Control (EDC) modules and Pressure Control Pilot (PCP) valves—the core components of displacement control systems for Danfoss S90 series variable piston pumps. The KVEB series represents Danfoss’s next-generation electric displacement control solution for S90 series pumps, designed as a direct replacement for the previous MCV111 and KVEA series control modules.
The portfolio includes KVEBB Series complete EDC control modules and KVEBA Series pressure control pilot valves. As part of product improvements, the KVEB series incorporates design enhancements in the control spool and feedback mechanism, as well as nozzle area/clearance revisions, while maintaining 100% mechanical and hydraulic interchangeability with previous products.
Product lineup overview:
KVEBB0502 is an EDC control module specifically designed for S90 series 55cc displacement piston pumps, featuring dual coil configuration with MS connector
KVEBB1304 is an EDC control module specifically designed for S90 series 130cc displacement piston pumps, featuring dual coil configuration
KVEBA5210 is a Pressure Control Pilot (PCP) valve, serving as the core pilot control component of the EDC module
The KVEB series employs a torque-motor based electrical actuation scheme designed to operate with DC milliampere current signals. Both KVEB and MCV feature dual coil configurations but with different coil resistance values (KVEB: 16Ω and 20Ω; MCV: 25Ω and 25Ω).
Manufactured to strict Danfoss OEM specifications, all products offer 100% direct interchangeability with original parts—no modifications required for installation. Every unit undergoes 100% application-condition simulation testing—comprehensive verification of pressure, flow, response characteristics, and leakage on dedicated test benches against published specifications. Perfect OEM replacement for Danfoss/Sauer-Danfoss original parts, ideal for hydraulic system repairs and preventive maintenance.
II. Technical Specifications
KVEBB0502 – EDC Control Module for S90 55cc Pump
Model: KVEBB0502
Brand: Danfoss (formerly Sauer-Danfoss)
Product Series: Series 90
Product Type: Electric Displacement Control (EDC) module
Compatible Pump: S90 series variable piston pump, 55cc displacement
Control Method: Electric Displacement Control (EDC)
Coil Configuration: Dual coil
Coil Resistance: 16Ω and 20Ω
Connection: MS connector (MS CON)
Weight: 3.47 kg
Country of Origin: USA
Product Condition: New, unused in original packaging
Replacement Note: KVEB series replaces previous KVEA series control modules
KVEBB1304 – EDC Control Module for S90 130cc Pump
Model: KVEBB1304
Brand: Danfoss (formerly Sauer-Danfoss)
Product Series: Series 90
Product Type: Electric Displacement Control (EDC) module
Compatible Pump: S90 series variable piston pump, 130cc displacement
Control Method: Electric Displacement Control (EDC)
Coil Configuration: Dual coil
Coil Resistance: 16Ω and 20Ω
Assembly: Complete EDC control module
Replacement Note: KVEB series replaces previous KVEA series control modules
KVEBA5210 – Pressure Control Pilot Valve (PCP)
Model: KVEBA5210
Brand: Danfoss (formerly Sauer-Danfoss)
Product Type: Pressure Control Pilot (PCP) valve
Compatible System: S90 series variable piston pumps
Actuation: Torque-motor driven
Valve Configuration: Double-nozzle flapper
Output: Differential output pressure proportional to electrical input signal
Control Type: Single-stage, standalone closed-loop pressure control
Closed-loop Principle: Achieved via internal hydraulic pressure reactions
Control Signal: DC milliampere current signal (DC mA)
Product Association: KVEBA series serves as the pilot valve component for KVEB control modules
III. Key Technical Advantages
1. Torque-Motor + Double-Nozzle Flapper Pilot Technology (KVEBA5210)
The KVEBA5210 Pressure Control Pilot valve features torque-motor actuation with a double-nozzle flapper configuration, precisely converting electrical input signals into proportional pilot pressure output. This design delivers exceptional pressure-to-current linearity and fast response characteristics, making it the core technology enabling precise displacement control for S90 series pumps.
2. Single-Stage Closed-Loop Control – No External Feedback Required
The KVEBA5210 is a single-stage, standalone closed-loop pressure control valve that achieves its closed-loop characteristics using internal hydraulic pressure reactions. This eliminates the need for external pressure sensors or complex closed-loop control circuits, significantly simplifying system architecture and improving overall reliability.
3. 100% Direct Interchangeability & OEM-Standard Manufacturing
All models are manufactured to strict Danfoss/Sauer-Danfoss OEM specifications, ensuring 100% mechanical and hydraulic interchangeability with original parts. The KVEB series incorporates design enhancements in the control spool and feedback mechanism, as well as nozzle area/clearance revisions, while maintaining form and fit—allowing direct replacement of previous KVEA and MCV111 series control modules.
4. Dual Coil Redundancy for Enhanced System Reliability
Both KVEBB0502 and KVEBB1304 feature a dual coil configuration, providing control redundancy. Should one coil fail, the other coil can maintain basic control functionality. Note: KVEB coils have resistance values of 16Ω and 20Ω, differing from MCV series (25Ω and 25Ω). When mixing KVEB and MCV in the same system, a series electrical connection is recommended to ensure all EDCs receive identical current.
5. Product Improvement & Performance Optimization
As an improvement over the previous KVEA series, the KVEB series incorporates the following enhancements:
Control spool and feedback mechanism improvements
Nozzle area and clearance optimizations
These improvements do not affect form or fit, maintaining complete interchangeability
6. Wide Current Control Range & Precise Displacement Regulation
The KVEB series EDC employs a torque-motor based electrical actuation scheme designed for DC milliampere current signal control. Operators can precisely regulate pump displacement via electrical signals, enabling stepless control from zero to maximum flow—significantly improving energy efficiency and operational precision.
IV. Application Areas
This EDC product series is specifically designed for variable pump electric displacement control systems in mobile and industrial hydraulics, compatible with Danfoss S90 series variable piston pumps across a wide range of equipment:
Construction Equipment Hydraulics: Excavators, wheel loaders, bulldozers—electric displacement control for S90 series closed-circuit pump drive systems
Road Construction & Compaction Equipment: Rollers, pavers—S90 series closed-circuit pump drive systems
Material Handling Equipment: Forklifts, reach stackers, telescopic handlers
Agricultural Machinery: Large combine harvesters, tractors—hydrostatic drive systems
Mining & Underground Equipment: Mining trucks, LHD loaders
Specialty Vehicles: Concrete pump trucks, municipal sanitation vehicles, fire trucks
Typical circuit applications include: variable pump electric displacement control (EDC) , pump outlet pressure closed-loop control, load sensing system pilot pressure control.
V. Expert Maintenance Tips
1. Verify Model & Displacement Matching (★★★★★)
KVEBB0502 is specifically designed for S90 series 55cc displacement piston pumps
KVEBB1304 is specifically designed for S90 series 130cc displacement piston pumps
Confirm pump displacement matches the module model before installation. Mismatched pairing will result in displacement control errors and may cause severe pump damage.
2. KVEB vs. MCV/KVEA Compatibility Considerations (★★★★★)
The KVEB series is a direct replacement for KVEA and MCV111. Important considerations:
KVEB coil resistance: 16Ω and 20Ω; MCV coil resistance: 25Ω and 25Ω
When mixing KVEB and MCV in the same vehicle propel application with parallel electrical connection, the KVEB pump will stroke approximately 25% ahead of the MCV
A series electrical connection is recommended to ensure all EDCs receive identical current
When possible, use the same type of EDC for all pumps in the system
3. Oil Cleanliness Management (★★★★★)
KVEB series EDC control modules contain精密 pilot valve spools and nozzle-flapper structures that are highly sensitive to oil contamination. Maintain system oil cleanliness at ISO 4406 16/14/12 or better. Use 10μm or higher-precision return filters and inspect filter elements regularly.
4. Pilot Oil Supply Pressure Verification
The KVEBA5210 pressure control pilot valve requires a stable pilot oil supply. Verify system pilot pressure meets the operating requirements before installation. Unstable pilot pressure will directly affect displacement control accuracy and response speed.
5. Electrical Connection & Shielding
KVEBB0502 features an MS connector
KVEBB1304 features standard industrial connectors
Control signals are DC milliampere current signals—sensitive to electromagnetic interference
Use shielded twisted-pair cables for control wiring, with shield grounded at one end to minimize interference from high-power electrical equipment
6. Installation Torque Specifications
When mounting EDC control modules to the pump body, tighten mounting bolts to Danfoss recommended torque. Excessive torque may deform the module housing and affect internal spool movement; insufficient torque may cause seal failure and external leakage.
7. Storage Environment
Recommended storage temperature: -40°C to +85°C. Avoid impact loads on the module body during installation. Handle with care to prevent drop damage to精密 pilot valve components.
